SRS Validity Area Configuration for RRC Inactive Cell Reselection
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Solution Overview
Problem
The high power consumption of terminals in the RRC_INACTIVE state due to the release of uplink positioning reference signal configurations when reselecting cells that do not receive the configuration, necessitating frequent reconfigurations.
Innovation Solution
The implementation of validity area information in SRS configurations to reserve SRS resources for terminals in RRC_INACTIVE state, ensuring continued signal transmission across coverage areas without the need for reconfiguration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the terminal reselects a cell that does not receive the reference signal configuration, then the terminal can access a new cell, but the configuration is released and reconfiguration is needed, increasing power consumption
Solution Approach 1:
The network pre-configures validity area information along with the SRS configuration parameters before the terminal enters RRC_INACTIVE state. This preliminary action ensures that the terminal already possesses the necessary configuration data for multiple cells, eliminating the need for reconfiguration when cell reselection occurs, thereby reducing power consumption while maintaining cell reselection capability
2Device complexity
If the uplink positioning reference signal configuration is valid only in a specific cell, then the configuration is simple to manage, but frequent reconfiguration is needed when the terminal moves, increasing power consumption
Solution Approach 1:
The SRS configuration is enhanced with validity area information that enables it to be applicable across multiple cells (first cell and second cell) rather than being limited to a single cell. This multi-functionality allows the configuration to remain valid during cell reselection within the validity area, reducing the frequency of reconfiguration operations and thereby lowering terminal power consumption while maintaining manageable configuration complexity
3Use of energy by moving object
If the terminal remains in RRC_INACTIVE state with valid configuration, then power consumption is reduced, but the configuration becomes invalid when moving to a different cell, requiring reconfiguration
Solution Approach 1:
The network performs preliminary configuration by providing validity area information along with SRS parameters before the terminal enters RRC_INACTIVE state. This advance preparation ensures the configuration remains valid across cell boundaries within the specified area, allowing the terminal to maintain low power consumption while moving between cells without requiring frequent reconfiguration
Solution Approach 2:
The configuration validity is extended from a single-cell dimension to a multi-cell dimension by introducing validity area information. This dimensional expansion allows the configuration to cover multiple cells (first cell and second cell), enabling the terminal to maintain configuration validity while moving between cells in RRC_INACTIVE state, thus reducing power consumption without sacrificing adaptability
Data Source
AI summary
An SRS configuration method and apparatus, and a related device. The SRS configuration method in embodiments of this application includes: A first access network device receives a first SRS configuration sent by a location management function LMF. The first SRS configuration includes validity area information. The validity area information is used for indicating coverage of a second access network device that reserves an SRS resource for a terminal when the terminal is released to a radio resource control RRC inactive state.